What is the evidence for the ruling that wudu' is obligatory for the one who washes the deceased?

Question : What is the evidence for this opinion, meaning the opinion that wudu' is obligatory? Their evidence is what was narrated from Ibn 'Umar, Abu Hurayrah, and Ibn 'Abbas, all three of whom, that they ordered the one who washes the deceased to perform wudu'.

Answer : Yes. Now, these are three of the Companions. How many Companions remained? Hmm? Many remained. Furthermore, their ordering the one who washes the deceased to perform wudu' is possible that it is on the basis of recommendation, not on the basis of obligation. This is the evidence. The evidence, therefore, is what was narrated from 'Abdullah ibn 'Umar, Ibn 'Abbas, and Abu Hurayrah regarding ordering the one who washes the deceased to perform wudu'. They gave the reason, saying: because the one who washes the deceased usually touches his private parts, and touching the private parts invalidates the wudu'. And at that point, we made it obligatory for the one who washes a deceased person to perform wudu'.